SN74ALS642A-1 八路总线收发器
SN74ALS642A-1 描述
These octal bus transceivers are designed for asynchronous two-way communication between
data buses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus, depending upon the level at the direction-control (DIR) input. The output-enable 
input disables the device so that the buses are effectively isolated.
The -1 versions of the SN74ALS641A and SN74ALS642A are identical to the standard versions, except that the recommended maximum IOL is increased to 48 mA in the -1 versions.
The SN74ALS641A, SN74ALS642A, and SN74AS641 are characterized for operation from 0°C to 70°C
| SN74ALS642A-1 | |
| Voltage Nodes(V) | 5 |
| Vcc range(V) | 4.75 to 5.25 |
| Input Level | TTL |
| Output Level | TTL |
| Output Drive(mA) | - /48 |
| No. of Outputs | 8 |
| Logic | True |
| Static Current | 42 |
| tpd max(ns) | 25 |
| Rating | Catalog |
| Technology Family | ALS |
SN74ALS642A-1 特性
- Bidirectional Bus Transceivers in High-Density 20-Pin Packages
- Choice of True or Inverting Logic
- Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (N) 300-mil DIPs
SN74ALS642A-1 芯片订购指南
| 器件 | 状态 | 温度 | 价格（美元） | 封装 | 引脚 | 封装数量 | 封装载体 | 丝印标记 |
| SN74ALS642A-1NSR | ACTIVE | 0 to 70 | 7.95 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74ALS642A-1NSRE4 | ACTIVE | 0 to 70 | 7.95 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R | |
| SN74ALS642A-1NSRG4 | ACTIVE | 0 to 70 | 7.95 | 1ku | SO (NS) | 20 | 2000 | LARGE T&R |
SN74ALS642A-1 质量与无铅数据
| 器件 | 环保计划* | 铅/焊球涂层 | MSL 等级/回流焊峰 | 环保信息与无铅 (Pb-free) | DPPM / MTBF / FIT 率 |
| SN74ALS642A-1NSR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS642A-1NSR | SN74ALS642A-1NSR |
| SN74ALS642A-1NSRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS642A-1NSRE4 | SN74ALS642A-1NSRE4 |
| SN74ALS642A-1NSRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN74ALS642A-1NSRG4 | SN74ALS642A-1NSRG4 |
SN74ALS642A-1 应用技术支持与电子电路设计开发资源下载
- SN74ALS642A-1 数据资料 dataSheet 下载.PDF
- TI 德州仪器缓冲器、驱动器/收发器产品选型与价格 . xls
- CMOS 非缓冲反向器在振荡器电路中的使用 (PDF 951 KB)
- Semiconductor Packing Methodology (PDF 3005 KB)
- 逻辑产品选择指南 2006/2007 （修订版 Z）(4462KB)
- 标准线性和逻辑产品 5 分钟指南 (786KB)
- 了解和解释标准逻辑数据表
- LOGIC Pocket Data Book (PDF 6001 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- Logic Cross-Reference (PDF 2938 KB)
